Crusher-head for gyratory ore-crushers.



No. 870,952. PATENTED NOV. 12, 1907. G. W. GU'ITZBIT.

GRUSHER HEAD FOR GYRATORY ORE GRUSHERS;

APPLIOA'IION FILED APB. 14,1906.

U I ED STATES eATENT oFFIcE.

CHARLES W. GUTTZEIT, OF HIGH BRIDGE, NEW JERSEY, ASSIGNOR TO TAYLOR IRON AND STEEL COMPANY, OF HIGH BRIDGE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

CRUSHER-HEAD FOR GYRATORY ORE-CRUSHERS.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed April 14. 1906. Serial No. 311.804.

To all whom 'it may concern:

Be it known that I, CHARLES W. Gu'r'rzurr, a citizen of the United States, residing at High Bridge, in the State of New Jersey, have invented certain new and useful Crusher-Heads for Gyi'atory Ore-Crushers, of

which the following is a. specification.

My invention relates to improvements in crusher heads for gyratory crushers and particularly in the structure and manner of mounting and securing upon the headthe active crushing member which sustains the principal and most severe portion of the crushing action.

My invention, moreover, is chiefly, though. not exclusively concerned with means for holding the active crushing member upon the head, whereby said mem; her will be at all times tightly and securely held in place, notwithstanding expansion of said member due to heat generated therein by the crushing action.

My invention will be best understood from a description of one embodiment thereof which has been here selected for illustration and is shown in the accompanying drawings in which:

Figure 1 is a side elevation, partly in section, of a crusher head embodying my invention, and Fig. 2 is a plan view thereof.

Gyratory ore crushers of the character to which my invention is applied, and as commonly constructed, comprise an ore receiving chamber within which is mounted a crusher head which is caused to gyrate within the chamber and thereby crush the ore against the concave sides thereof. The walls of the chamber converge from top to bottom, thereby forming with the head a diminishing annular space, whereby the head, in its gyratory motion may effectually engage and crush the ore. The crusher head is mounted on a ver' tical shaft to which gyratory movement may be imparted in any suitable and well known manner. The chief difficulty experienced in the practical operation of such crushers hes in the fact that when the active crushing portion or member of the crusher head becomes heated from its crushing action, it expands and consequently becomes loose upon the gyrating shaft, whereby, during the subsequent crushing operation, it is extremely liable to become cracked or broken and in any event is subjected to unusually severe wear. My invention aims to overcome this difficulty by providing means for securing the head upon the shaft in such manner that while it may freely expand,

' it will at all times be tightly and firmly held with respect to its supporting shaft and to the adjacent crushing surfaces. To this end the active crushing member 1, which for convenient reference is herein desig nated the crushing member, is cored at its center to fit the gyrating shaft 2, and is provided with the upper and lower angular surfaces 3 and 4 which are engagcd respectively by the correspondingly angular faces 5 and 6 of a clamping member 7 slidably but nonrotatably mounted upon the shaft 2, and a supporting ring 8 which is securely mounted upon the shaft.

The crushing member is preferably formed with a depending circular portion 10 which overlies and protects the steel supporting ring 8. The exterior face of the clamping member 7 is shaped to guide the ore to the crushing face of the crushing member.

The crushing member 1 and the clamping member 7 may be secured against rotation upon the shaft 2 as by keys 11 and 1.2 respectively.

A further feature of my invention resides in the means for securing the clamping member 7 and consequently the crushing member against longitudinal movement on the shaft 2, which comprise a pair of semi-circular holding rings 13 and 14, (Fig. 2) which are secured together and above the clamping member Tin an annular neck or groove 15 of the shaft 2 by means of bolts 16, the nuts 17 of which may be locked in place in any suitable manner as by cotter pins 18 the ends of which may engage the outer faces of the nuts. This manner of securing the clamping member in place is greatly superior to that afforded by the clamping nuts ordinarily used, in that no amount of jarring of the head can loosen said clamping rings 13 and 14 and the thrust is taken directly by the upper shoulder of the neck or groove 15.

In the operation of the crusher head the outward expansion of the crusher member 1 may take place freely between the faces 5 and 6 of the clamping member 7 and the supporting ring 8, while at the same time said crusher member will be firmly and tightly held against bodily lateral movement with respect to the shaft 2 and hence all chance of crushing or breaking said member will be obviated.

By means of the above described secure and tight support of the crusher member under all conditions of expansion or contraction, the life thereof is greatly prolonged in practice and the action of the crusher is at all times uniform.

Many changes may be made in the structure and relative arrangement of the parts of the device without departing from the spirit and scope of the invention.

1. In a gyratory crusher head a crushing member and a supporting shaft therefor, and means to secure said member upon said shaft, said means being constructed and arranged to permit free lateral expansion and contraction of said member while holding it at all times firmly with respect to said shaft.

2. In a gyratory crusher head a crushing member having securing faces arranged at an angle to its supporting shaft, and means to engage said faces to hold said member firmly with respect to said shaft while permitting free lateral expansion and contraction of said head.

3. In a gyratory crusher head a supporting shaft and a crushing member having securing faces arranged at an angle to said shaft, and supporting and clamping mem bers respectively engaging said faces in such manner that said crushing member is permitted free expansion and contraction While being held at all times firmly against bodily movement with respect to said shaft.

4. In a gyratory crusher head a Supporting shaft and a crushing member having annular faces arranged at an angle to said shaft, a supporting member, and a clamping member each having annular faces corresponding to those upon the crusher head, and arranged to engage the latter faces respectively and to permit free expansion and contraction of said crushing member while holding it at all times against bodily movements with respect to said shaft.

5 As an article of manufacture a crushing member for a gyratory crusher head having at its ends annular secur ing faces arranged at an angle to its axis.

6. In a gyratory crusher a supporting shaft, a supporting ring secured to said shaft and a clamping sleeve slidably mounted on said shaft, but secured against rotation thereon, and a crushing member mounted between said ring and sleeve and so held thereby as to be free to 'expand and contra-ct while being at all times held against bodily movement with respect to said shaft.

7 In a gyratory crusher head a supporting shaft having an annular neck or groove, a crushing member and a supporting member therefor, a clamping member for holding said crushing member against longitudinal movement on said shaft, and having a crushing face, and a clamping ri'ng movably secured within said neck or groove'above and to hold said clamping member against longitudinal move ment on said shaft.

In testimony whereof I afifix my signature in the presence of two Witnesses.

CHARLES W GU'ITZEIT.

Witnesses:

GEORGE J. SNIDER, W. H. BLACK. 

